Tool for performing abrading or polishing operations



H. B. MILLER Dec. 17, 1940.

Filed Oct. 25, 1939 Patented Dec. 17, 1940 i f v UNITED STATES yPTlzNr 4orties TOOL FOR, PERFORMING ABRADING OR POLISHING OPERATIONS Homer B. Miller, Gardiner, Maine, assignor to United Shoe Machinery Corporation, Borough of Flemington, N. J.

Application October 25, 1939, Serial No. 301,246

6 Claims. (Cl. 51-192) This invention relates to tools for performing mainder of the tubular portion I6 is of reduced exabrading or polishing' operations and is herein ternal diameter to provide an annular space beillustrated and described as embodied in a roll tweenit and the tubular portion 28. The tubular suitable for bufng shoe'bottoms. The roll ilportion 28' is of reduced internal diameter at a` lustrated herein like most rolls intended for this locality surrounding the cylinder 20 to provide a 5 purpose provides a yieldable support for a bufling bearing surface 32 for the cylinder, the remainder cover of sheet material. of the tubular portion 28 being of enlarged in- It is an object of the present invention to proternal diameter to provide an annular space bevide an improved tool of the character under contween itself and the cylinder 20. The support 26 10 sideration. In accordance with a feature of the is provided also with a circular flange or disc 34 10 invention, the roll illustrated herein is provided which is spaced axially a considerable distance with a flexible sleeve'for supporting a buffing from the disc I 8. cover which sleeve is supported by a pair of mem- Supported at its ends upon the discs I8 and 34 bers adapted to be mounted at its ends on a rorespectively is a sleeve 36 of tough woven fabric l5 tary shaft and urged apart resiliently to tension such as canvas. The end portions of the sleeve 15 the sleeve. The supporting members as shown 36 are turned inwardly over the end faces of the herein have tubular portions in telescoping reladiscs I8 and 34 respectively and are clamped tion to each other andv are urged apart by a coil against said end faces by clamping rings 38 and spring. In order to provideafurther yielding sup- 48 respectively. The clamping rings 38 and 48 port in addition to the tension of the fiexible are tightened against their respective discs by 2o sleeve, an annular inflatable cushion surroundscrews 42. Surrounding the cylinder 28 and suring the telescoping members is mounted within rounded by the tubular portion 28 is a coil comthe sleeve. pression spring 50 one end of which abuts an out- These and other features of the invention comwardly turned shoulder 52 on the cylinder 20 and prising various combinations and arrangements the opposite end of which abuts an inwardly 25 of parts will be best understood from the followturned shoulder 54 on the support 26. The thrust ing description of a preferred embodiment shown of the spring 5I) urges the supports I4 and 26 apart in the -accompanying drawing, in which v axially and thereby tensions the sleeve 36.

Fig. 1 is a View mainly in longitudinal section; k Surrounding the tubular portion 28 and en- 30 and closed within the sleeve 36 and the supporting 30 Fig. 2 is a` transverse sectional view taken on discs I8 and 26 is an annular inflatable cushion the line l'I--II of Fig. 1. 44 of rubber. This cushion is infiated by an or- As shown in the drawing, the improved roll is dinary tire valve 46 (Fig. 2) extending through adapted to be mounted upon a rotary shaft I0. a suitable opening formed in one of the adjacent Secured to the shaft Il) by a set screw I2 isa supend discs I8 or 34. Carried 'by the flexible sleeve 35 porting member I4 having a tubular portion I6 36 is a tubular cover 48 of sheet material such as fitted upon the shaft I0 and an outwardly exemery clothsuitable for performing bufling optending fiange or disc I8. The tubular portion I6 erations. The cover 48, however, may consist of is externally threaded over a part of its length a polishing cloth or similar material in place of 40 to accommodate an internally threaded cylinder emery cloth. o 28 which, in effect, constitutes an adjustable ex- It is evident that the tool body above described tension of the tubular portion I6. The cylinder constitutes a unitary structure held together by 20 at its outer end is provided with an outwardly the exible sleeve 36. This structure may be apextending fiange 22 in the periphery of whichk are plied endwise over the shaft I8 and clamped in formed holes 24 to accommodate a wrench for position by the screw I2. The bufiing sleeve 48 45 turning the cylinder 20 upon the tubular portion may thenbe applied endwise over the sleeve 36. I6. A second support 26 has a tubular portion 28 In order to insure an internal .gripping pressure surrounding the portion I6 and the cylinder 20. against the bufiing sleeve, the cushion 48 is then The tubular portion I6 is of enlarged external inflated. In operation the bulging of the flexible diameter at a locality between the flange I8 and sleeve 36 under the pressure of the inflated cush- 50 the adjacent end of the cylinder 20 to provide a ion 44 is sufficient to insure rotation of the buiiing bearing surface 30 for the end of the tubular porsleeve 48 with the tool body. The pressure of the tion 28. A key 3l extending inwardly from the work against the tool is sustained not only by member 28 engages a corresponding slot in the the air pressure within the cushion 44 but also by member I4 to prevent relative rotation. The rethe tension induced in the iiexible sleeve 36 by 55 the spring 5U which enables theA operator to bear with considerable pressure against the Work Without danger of collapsing the sleeve 3S. The thrust of the spring 50 may be increased or diminished as desired by turning the flange 22 with a suitable Wrench.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A bung roll, comprising a exible sleeve for supporting a buffing cover, a pair of members adapted to be mounted on a rotary shaft for supporting the ends respectively of said sleeve, one of said members being freely movable axially with respect to the other, and resilient means for urging said supporting members apart to tension said sleeve.

2. A buing roll, comprising a flexible sleeve for supporting a buing cover, a pair of members adapted to support the ends respectively of said sleeve and each having a tubular portion in telescoping relation to the tubular portion of the other member, one of said tubular portions beingr constructed and arranged for attachment to a rotary shaft, means for securing the ends of said sleeve to said members respectively, means for preventing relative rotation between the members of said pair, and a spring exerting an axial thrust between said members to urge said discs apart and thus tension said sleeve.

3. A buing roll, comprising a exible sleeve for supporting a bufling cover, a support having a tubular portion adapted to be mounted on a rotary shaft, a support having a tubular portion surrounding the first-mentioned tubular portion, means for preventing relative rotation between Said tubular portions While enabling one of said tubular portions to move axially relativelyto the other, each of said supports having a circular outwardly extending flange, means for securing the ends of said sleeve to said flanges respectively, and a coil compression spring surrounding the first-mentioned tubular portion and surrounded by the second-mentioned tubular portion, said supports having shoulders in abutting engagement respectively with the ends of said spring, whereby the thrust of said spring urges the flange of one support away from the flange ofthe other support to tension the flexible sleeve.

4. A buing roll, comprising a exible sleeve for supporting a bufng cover, a support having an externally threaded tubular portion adapted to be mounted on a rotary shaft and having also at one end an outwardly extending circular flange, a cylinder threaded on said tubular portion to constitute an adjustable extension thereof, a support having a tubular portion slidable axially on the iirst-mentioned tubular portion and on said cylinder, the iirst-mentioned tubular portion being of enlarged external diameter at a locality between said flange and the adjacent end of said cylinder to provide a bearing surface for the second-mentioned tubular portion, and the second-mentioned tubular portion being of reduced internal diameter at a locality surrounding said cylinder to provide a bearing surface for the cylinder, the second-mentioned support having an 'outwardly extending ange spaced axially from the first-mentioned flange, means for securing the ends of said sleeve to said anges respectively, and a coil compression spring surrounding said cylinder and surrounded by the secondmentioned tubular member, said cylinder having 'an external shoulder in abutting engagement With one end of said spring, and the 'second-mentioned support having an internal shoulder in abutting egagement with the other end of said spring, whereby the thrust of said spring urges said anges apart axially to tension said sleeve, the magnitude of said thrust being determined by adjustment of said cylinder on the rst-mentioned tubular portion.

5. A buing roll, comprising a flexible sleeve for supporting a buffmg cover, a pair of members adapted to be mounted on a rotary shaft for supporting the ends respectively of said sleeve, resilient means for urging said supporting members apart to tensio-n said sleeve, and an inflatable cushion Within `said sleeve and surrounding the shaft to support the sleeve against the pressure of the work.

`6. A bufng roll, comprising a flexible sleeve for supporting a bufng cover, a pair of telescoping members adapted to be mounted on a rotary shaft for supporting the ends of Said sleeve respectively, a coil compression spring for urging said members apart to tension the sleeve, and an inflatable annular cushion Within said sleeve and surroundingV said telescoping members to support the sleeve against the pressure of the Work.

HOMER B. MILLER. 

